Ozonizer.



R. D. SMALL.

' OZONIZBR.

APPLIoATIoN FILED SEPT. 2a, 1910.

978,786. Patented Dec. 13, 1910.A

j Ml

UNITED STATES PATENT-Torrion- Y' RALPH D. SMALL, 0F CHICAGO, ILLINOIS, ASSIGNOR TOSTANDARD ELECTRO-UTILITIES COMPANY, 0F CHICAGO, ILLINOIS, ACORPORATION 0F ARIZONA TERRITORY.

OZONIZEB.

Specification of Letters Patent.

Patented Dec. 1 3, .1910.

Application led September 23, 1910. Serial No. 583,413.

more particularly to ozonizers of the-typeV shown and described in Letters Patent of the United States Nos. 951,443 and 969,547 granted to Oscar Linder on M arch 8, 1910 and September 6, 1910, respectively.

The general 'type of ozonizers to'which this `invention relates includes a stationary dielectric, a stationary electrode 'on one side thereof and a rotating electrode on -the other side thereof and spaced away therefrom a' suitable distance for the lproper production of the electric discharge. above referred to use is made of a stationary dielectric preferably in the form' of an annular ring surrounded on its exterior with a stationary electrode, therotating electrode being placed within the annular dielectric, and preferably being in the form of a fan which will produce a current of air for removing the ozone as rapidly as produced.-

It is, of course, understood that the 'above mentioned patents are not restricted to the use of a dielectric which is surrounded on its exterior periphery with a stationary elec- 'trode although this is the preferred construction. y

In Patent No. 969,547, above mentioned, use is made of a discharge shoe placedon each of one or more of the fan blades, its purpose being to increase the discharge area and at the same time prevent local heating of the parts and the formation'of obnoxious gases by reason of a concentrated discharge.

In the present invention I provide a complete annular band surrounding all of the blades of the rotating electrode, or passing from one to the other so as to provide a complete i'ing electrode adjacent the dielectric. By this means I am enabled to further increase the discharge area, and at the same time largely increase the strength of the moving element, reinforcing it near its outer periphery where the stresses coming upon it are greatest. It will .be understood that where a separate shoe is attached to each Inl the patents action.

blade of the electrode the weight of the 4same isnincreased near its periphery,"thus largely increasing the centrifugal force. In the present construction, however, the rotating discharge surface is in the form of a continuous band and therefore-no centrifugal force is added to that which would otherwise exist in the rotating blades, and, I

in fact, the same are reinforced and strengthened. .In the present case, also, I provide a pluralityr of perforations in the discharge band. These servev to break the continuity o f tliesame, thus aiding in the discharge action and 'at the' same time they provide means for insuring a thorough passage ofthe moving air t-hrough and around the points of discharge, andaway'from them, thereby insuring that the ozonized air shall vbe removed' immediately after it has been formed and` thus preventing the formation of obnoxious or undesirable gases and at the` same time preventing the heating of the discharge surfaces.

It has heretofore been diicult to keep the l dielectric surface clean and free from dust. This is particularly true where the ozonizers o erate\with a fairly concentrated electric discharge. This dust is found to`interfere with the even and yelcient operation of the ozonizer,`so that its pro er operation is in? terfered with and its e ciency reduced.

@Another object of the present invention is to provide means for continuously cleaning the dielectric during operation and thus, and in other Ways, to improve the discharge Other objects and uses will appear from a detailed description of the invention which consists in the features of construction and combination of parts hereinafter described and claimed.

Referring now to the drawing, I show my generlal form shown and described in Letters Patent No. 969,547 above mentioned.

In the drawing Figure 1 shows a side view of the discharge elements as used with-an annular dielectric, the rotating element be-v invention as applied 4'to an ozonizer of the serted; and Fig. 5 shows a modified forml of ,brush holder.

In one embodiment of my invention I provide a perforated discharge band for encircling the tips of the blades of the rotat ing fan and suitably connected to them. I then attach one or more brushes to this band in proper position to clean the adjacent surface of the dielectric during operation. Referring now to the figures, the numeral 5 designates the stationary dielectric which vin the construction illustrated comprises an annular insulating plate. In its central portion this band is surrounded by a stationary electrode'such as a strip of tin foil 6. An insulating cover 7 surrounds the tin foil and protects the same from injury as well as reducing the electric leakage.

In the construction illustrated a suitable motor 8 drives an insulating hub 9 which in turn carries the rotating electrode 10. In the construction illustrated the latter comprises a fan whose blades 11 serve to throw a current of air and are surrounded by the discharge band electrode 12. The latter is suitably attached tothe tip of each blade and is provided with a plurality of air holes 13 whichpermit air/ to freely circulate all around the band electrode and to freely enter the space 14 between the electrode andV the dielectric. A slip ring 15 is suitably con-- v nected to the rotating electrode as by a wire 16 and receives its supply of current through a brush 17.

It will be seen that the constructionabove illustrated and described provides 'an ex#- tremely simple means for obtaining a large discharge surface properly ventilated to prevent the accumulation of ozonized air in any one place, thus insuring a free and continuous removal of ozone.

- lI will now describe the preferred form of cleaning device. This comprises essentially one or more small-brushes iiexibly supported by the rotating electrode in posi. tion to properly clean the dielectric when the electrode is rotating. In the construction Iillustrated I provide a transverse slot 18 in the rotating electrode through which may project a brush 19. The latter is supported by means of a spring bracket 2O rigidly secured at one end 21 to the elec! trode. Atits free endthis bracket carries a transverse slotted member 22 into which may be slid a bead 23 of the brush. The latter may be held in position merely by'the dielectric as illustrated in Fig. 3. As soon,

however, as the rotating electrode attains the ncce sary speed the brush will be thrown.

out. by means of centrifugal force intoicontact with the dielectric which it will thereafter sweep and thus maintain clean. As soon as the speed of the electrode falls suiiicient the brush will 'again be drawn back from the dielectric.

It is preferable to provide two brushes spaced diagonally opposite from each other and each one of a length slightly greater than one-half of the width of the rotating electrode band. When this construction is adopted the slots-18 do not have to extend clear across the entire width of the electrode band and thus the latter is not com letely severed. Furthermore, the centrifugalpforces of the rotating y.element are thus equalized and a perfectly balanced machine results.

In Fig. 5 I show a modified form of brush holder in which the end of the Spring arm 20 is bent into a U shape 26 for receiving the body of the brush. Each side of the U is provided with an indentation 27 for holding the brush in place. This construetion is a very simple one, it being made from a single piece of material, and can be very I cheaply produced.

I claim:

1. In an ozonizer the combination of a stationary dielectric, a stationary electrode on one side thereof, a rotating'electrode on the other side thereof, and means for continuously cleaning the dielectric during the operation of theu ozonizer, substantially as described.

2. In an ozonizer the vcombination of a stationary dielectric, a stationar electrode on one side thereof, a rotating e ectrodeon the other side thereof, a cleaning device for the dielectric, and means for maintaining the cleaning device in engagement the dielectric during the operation of theflozonizer and out of engagement with the dielectric when the ozonizer is not in use.

, 3. In any ozonizer the combination of a stationary dielectric, a stationary electrodey on one side thereof, a rotating dielectric n the other side thereof, and a cleaning deviceN attached to the rotating dielectric in a manner to be thrown into engagement with the dielectric by centrifugal force during operation of the vozonizer, substantially as described.

4. In an ozonizer the combination vof a stationary dielectric, a stationary electrode on one side thereof and a continuous rotatable perforated electrode on the other side thereof, substantially'as described.

5.111 an ozonizer the combination of a stationary dielectric, a stationary electrode on one side thereof, a rotatin fan electrode on the other side thereof,V an a continuous perforated discharge band attached to the tips of the fan and prvidin 'a discharge surface, substantially as descri ed. Y

6. In an ozonizer the combination Vof a stationary dielectric, a stationary electrode on one side thereof, a continuous perforated rotating discharge electrode on the other side thereof, and means for creating an airdra-ft through the perforations during. operation of the ozonizer to carry off the ozomzed air, substantially as described.

7. In an ozonizer the combination of a i stationary 'dielectric in the form ofva continuous annular band' o f insulating material,

a stationary electrode surrounding a portion l of theexterior surface thereof, a rotating fan electrode within the dielectric, anda continuous perforated discharge band at` tached to the tips of the fan blade in position to create an electrical discharge through the dielectric to the stationary electrode, substantially as described.A

8. In an ozonizer the combination of an annular stationary dielectric, an electrode band surrounding a portion of the exterior surface thereof, a "rotatin fan' electrode lWithin the dielectric, a continuous discharge band surrounding the tips of the fan blades, and a pair of oppositely disposed cleaning brushes attached to A.the rotating electrode band in position to clean the inner surface of the dielectric, substantially as described.

`RALPH D. SMALL. j Witnesses: Y l

THOMAS A. BANNING, Jr., PHILIP M. WALTER. 

